Dear scheduling researcher,
We are delighted to announce the talk given by Nils Boysen (University
of Jena).
The title is " Scheduling in the e-commerce era: New scheduling problems
in order fulfilment and warehousing".
The seminar will take place on Zoom on Wednesday, February 21 at 14:00 UTC.
Join Zoom Meeting
https://cesnet.zoom.us/j/95552422876?pwd=Y1lPM2RVeTR4cmh5anMyUXUzWVBGZz09
Meeting ID: 955 5242 2876
Passcode: 739068
You can follow the seminar online or offline on our Youtube channel as well:
https://www.youtube.com/channel/UCUoCNnaAfw5NAntItILFn4A
The abstract follows.
Driven by the success of e-commerce, today's warehouses are evolving
into fully automated fulfillment factories. Many of them follow the
parts-to-picker paradigm, using mobile shelf-lifting robots or conveyors
to deliver stock keeping units (SKUs) to stationary order pickers
working in picking workstations. This talk aims to structure and review
the family of fulfillment-related scheduling problems that arise in this
environment: On the input side, the sequence in which totes of SKUs are
delivered to a workstation must be synchronized with the orders that are
being assembled there at the same time on the output side. In this way,
a more efficient fulfillment process can be achieved, and the bin supply
system can be relieved. This talk classifies the family of slightly
different order fulfillment scheduling problems that arise with
different workstation setups in alternative warehouses. This
classification scheme is used to survey the existing literature, analyze
the computational complexity, and systematically quantify the gains of
alternative workstation setups. The talk also highlights valuable future
research ideas for this emerging area of scheduling research.
The next talk in our series will be:
Laurent Perron (Google France) | March 6 | The CP-SAT solver.
For more details, please visit https://schedulingseminar.com/
With kind regards
Zdenek, Mike and Guohua
--
Zdenek Hanzalek
Industrial Informatics Department,
Czech Institute of Informatics, Robotics and Cybernetics,
Czech Technical University in Prague,
Jugoslavskych partyzanu 1580/3, 160 00 Prague 6, Czech Republic
https://rtime.ciirc.cvut.cz/~hanzalek/
Dear scheduling researcher,
We are delighted to announce the talk given by Ceyda Oğuz (Koç University).
The title is "A Matheuristic for the Generalized Order Acceptance and
Scheduling Problem".
The seminar will take place on Zoom on Wednesday, February 7 at 14:00 UTC.
Join Zoom Meeting
https://cesnet.zoom.us/j/95550377545?pwd=NUNRWlhjZHRzZDg5aWRCOTA1S3RzQT09
Meeting ID: 955 5037 7545
Passcode: 003354
You can follow the seminar online or offline on our Youtube channel as well:
https://www.youtube.com/channel/UCUoCNnaAfw5NAntItILFn4A
The abstract follows.
Firms operating on a make-to-order basis may not satisfy the entire
demand due to limited capacity and tight delivery times. This
necessitates selecting only part of customer orders to maximize the
total revenue, which gives rise to the order acceptance and scheduling
(OAS) problems. In this study, we investigate a generalized version of
the OAS (GOAS) problem originating from a real- life setting. Due to
several components of the problem, such as release times, due dates,
deadlines and sequence dependent setup times, finding an exact solution
to GOAS problem, that determines which orders to accept and how to
schedule them simultaneously to maximize the revenue, in reasonable time
even in a single machine environment is difficult. Hence, we develop an
effective and efficient matheuristic, which consists of a time-bucket
based mixed integer linear programming model, a variable neighborhood
search algorithm and a tabu search algorithm, for the GOAS problem.
Computational results show that the proposed matheuristic outperforms
the state-of-the- art algorithms developed for the GOAS problem. The
boundary of optimally solved instance size is pushed further and near
optimal solutions are obtained in reasonable time for instances falling
beyond this boundary. Joint work with İstenç Tarhan.
The next talk in our series will be:
Nils Boysen (University of Jena) | February 21 | Scheduling in the
e-commerce era: New scheduling problems in order fulfilment and warehousing.
For more details, please visit https://schedulingseminar.com/
With kind regards
Zdenek, Mike and Guohua
--
Zdenek Hanzalek
Industrial Informatics Department,
Czech Institute of Informatics, Robotics and Cybernetics,
Czech Technical University in Prague,
Jugoslavskych partyzanu 1580/3, 160 00 Prague 6, Czech Republic
https://rtime.ciirc.cvut.cz/~hanzalek/